By Tzvi Machlin Pittsburgh Steelers rookie wide receiver George Pickens has played 95 snaps through the first two weeks of the NFL season but has only been targeted five times – a fact Pickens made it clear he’s well aware of. This week Pickens basically called out quarterback Mitchell Trubisky, declaring that he’s open “90-percent of the time.” Trubisky promptly responded to the challenge from his rookie receiver. Speaking to the media, Trubisky admitted that he could try and find Pickens more often. He complimented Pickens on how well he’s been playing and admitted that he needs to make bett…